A method, apparatus and storage medium of non-contact antenna layout

Abstract

The application discloses a method and device for non-contact antenna layout and a storage medium. The method is used for reducing the occurrence of signal blind spots in the working area of the non-contact antenna, and improving payment efficiency and user payment experience. The method comprises the following steps: obtaining field strength distribution information of the non-contact antenna on the mainboard of a terminal, wherein the field strength distribution information is information obtained through simulation; determining a to-be-optimized field strength area in the mainboard according to the field strength distribution information; and performing an adjustment operation on the non-contact antenna in the to-be-optimized field strength area, wherein the adjustment operation comprises adjusting the wiring mode of the non-contact antenna from straight-line wiring to spiral wiring and adjusting the physical parameters of the non-contact antenna.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic engineering, and in particular to a non-contact antenna layout method and device and storage medium. BACKGROUND

[0002] At present, more and more electronic payment terminals begin to support non-contact payment, and this payment method has been widely applied in public transportation, supermarkets, catering and other fields. Non-contact payment refers to a payment method without physical contact. Near field communication technology NFC is a short-range wireless communication technology that can transmit and exchange data between terminals, and is one of the technologies for realizing non-contact payment.

[0003] Generally, a non-contact antenna is arranged in the NFC scanning area of an electronic payment terminal. When a user makes a non-contact payment, the user only needs to place a mobile phone or other mobile terminal supporting non-contact payment in close proximity to the scanning area of the electronic payment terminal. The electronic payment terminal authenticates the payment information of the user through the non-contact antenna and completes the payment.

[0004] However, the overall structure of the electronic payment terminal is complex, and other metal components can also be distributed near the non-contact antenna. When current passes through these metal components, it will generate its own magnetic field around it, causing eddy current phenomenon, thereby changing the electric field intensity of the non-contact antenna, resulting in signal blind spot problems in the actual use of the electronic payment terminal, affecting the user payment experience. SUMMARY

[0005] To solve the above technical problems, the present application provides a non-contact antenna layout method, device and storage medium.

[0006] The technical solutions provided in the present application are described as follows:

[0007] The first aspect of the present application provides a non-contact antenna layout method, which comprises:

[0008] Obtaining field strength distribution information of a non-contact antenna on a mainboard of a terminal, wherein the field strength distribution information is information obtained through simulation;

[0009] Determining a to-be-optimized field strength area in the mainboard according to the field strength distribution information;

[0010] Performing an adjustment operation on the non-contact antenna in the to-be-optimized field strength area, wherein the adjustment operation comprises adjusting the wiring mode of the non-contact antenna from straight-line wiring to spiral wiring and adjusting the physical parameters of the non-contact antenna.

[0011] Optionally, the performing an adjustment operation on the non-contact antenna in the to-be-optimized field strength area comprises:

[0012] determining an adjustment target of the field strength region to be optimized;

[0013] calculating physical parameters of the non-contact antenna according to the adjustment target, the physical parameters including size, number of turns and spacing of a coil;

[0014] adjusting a wire arrangement of the non-contact antenna in the field strength region to be optimized from a straight wire arrangement to a spiral wire arrangement according to the physical parameters.

[0015] Optionally, when the adjustment target is to enhance the field strength, the spiral wire arrangement is a same-direction spiral wire arrangement;

[0016] when the adjustment target is to weaken the field strength, the spiral wire arrangement is a reverse spiral wire arrangement.

[0017] Optionally, the determining of the field strength region to be optimized in the mainboard according to the field strength distribution information comprises:

[0018] determining field strength threshold values of different regions in the mainboard based on EMV authentication requirements;

[0019] determining a region that does not meet the field strength threshold value as the field strength region to be optimized in the mainboard according to the field strength distribution information.

[0020] Optionally, the determining of the field strength region to be optimized in the mainboard according to the field strength distribution information comprises:

[0021] performing a field strength uniformity check according to the field strength distribution information;

[0022] determining a region that fails the field strength uniformity check as the field strength region to be optimized in the mainboard.

[0023] Optionally, the obtaining of the field strength distribution information of the non-contact antenna on the mainboard of the terminal comprises:

[0024] defining component material properties of the non-contact antenna according to an overall environment of the terminal to construct a non-contact antenna model;

[0025] setting a simulation environment of the non-contact antenna model;

[0026] simulating the non-contact antenna model according to the simulation environment to obtain the field strength distribution information of the non-contact antenna on the mainboard of the terminal.

[0027] Optionally, the setting of the simulation environment of the non-contact antenna model comprises:

[0028] setting simulation excitation, field monitors, meshes, solvers, working frequencies, boundary conditions and convergence parameters of the non-contact antenna model.

[0029] The second aspect of the application provides a device of a non-contact antenna layout, the device comprising:

[0030] an acquisition unit configured to acquire field strength distribution information of a non-contact antenna on a mainboard of a terminal, the field strength distribution information being information obtained through simulation;

[0031] a determination unit configured to determine a to-be-optimized field strength region on the mainboard according to the field strength distribution information;

[0032] an adjustment unit configured to perform an adjustment operation on the non-contact antenna in the to-be-optimized field strength region, the adjustment operation comprising adjusting a wiring mode of the non-contact antenna from straight-line wiring to spiral wiring and adjusting a physical parameter of the non-contact antenna.

[0033] Optionally, the adjustment unit is further configured to:

[0034] determine an adjustment target of the to-be-optimized field strength region;

[0035] calculate the physical parameter of the non-contact antenna according to the adjustment target, the physical parameter comprising a size, a number of turns and a spacing of a coil;

[0036] adjust the wiring mode of the non-contact antenna in the to-be-optimized field strength region from straight-line wiring to spiral wiring according to the physical parameter.

[0037] Optionally, the adjustment unit is further configured to:

[0038] when the adjustment target is to enhance the field strength, the spiral wiring is same-direction spiral wiring;

[0039] when the adjustment target is to weaken the field strength, the spiral wiring is reverse spiral wiring.

[0040] Optionally, the determination unit is further configured to:

[0041] determine a field strength threshold of different regions in the mainboard based on EMV authentication requirements;

[0042] determine a region that does not meet the field strength threshold as a to-be-optimized field strength region in the mainboard according to the field strength distribution information.

[0043] Optionally, the determination unit is further configured to:

[0044] perform a field strength uniformity check according to the field strength distribution information;

[0045] determine a region that fails the field strength uniformity check as a to-be-optimized field strength region in the mainboard.

[0046] Optionally, the acquisition unit is further configured to:

[0047] According to the whole machine environment of the terminal, component material properties of the non-contact antenna are defined, and a non-contact antenna model is constructed;

[0048] A simulation environment of the non-contact antenna model is set up;

[0049] The non-contact antenna model is simulated according to the simulation environment, and field strength distribution information of the non-contact antenna on the mainboard of the terminal is obtained.

[0050] Optionally, the obtaining unit is further configured to:

[0051] A simulation excitation, a field monitor, a grid, a solver, a working frequency, a boundary condition and a convergence parameter of the non-contact antenna model are set up.

[0052] The third aspect of the present application provides a non-contact antenna layout device, and the device comprises:

[0053] A processor, a memory, an input / output unit and a bus;

[0054] The processor is connected with the memory, the input / output unit and the bus;

[0055] The memory stores a program, and the processor invokes the program to execute the method of the first aspect and any optional aspect of the first aspect.

[0056] The fourth aspect of the present application provides a computer readable storage medium, and the computer readable storage medium stores a program, and the program executes the method of the first aspect and any optional aspect of the first aspect when executed on a computer.

[0057] From the above technical solutions, the present application has the following advantages:

[0058] By obtaining the field strength distribution information of the non-contact antenna on the mainboard of the terminal, the to-be-optimized field strength region of the non-contact antenna is determined from the field strength distribution information, and the wiring mode and the physical parameters of the non-contact antenna are adjusted according to the to-be-optimized field strength region. The straight wiring mode of the non-contact antenna in the to-be-optimized field strength region is adjusted to a spiral wiring mode, so that the electromagnetic field distribution and the field strength and other electromagnetic characteristics of the to-be-optimized field strength region are optimized, and the efficiency and the performance of the non-contact antenna are improved. By changing the wiring mode of the non-contact antenna, the field strength of the non-contact antenna at each place is adjusted, so that the non-contact antenna signal can cover the working area, and the payment efficiency and the user payment experience are improved. BRIEF DESCRIPTION OF DRAWINGS

[0059] In order to more clearly illustrate the technical solutions in the present application, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0060] Figure 1 An embodiment flowchart of a method for non-contact antenna layout provided by the present application;

[0061] Figure 2 An embodiment flowchart of a method for performing adjustment operation in the non-contact antenna layout provided by the present application;

[0062] Figure 3 An embodiment flowchart of a method for adjusting spiral trace direction in the non-contact antenna layout provided by the present application;

[0063] Figure 4 An embodiment structure diagram of a trace mode after performing adjustment operation in the non-contact antenna layout provided by the present application;

[0064] Figure 5 An embodiment flowchart of a method for determining a field strength region to be optimized in the non-contact antenna layout provided by the present application;

[0065] Figure 6 Another embodiment flowchart of a method for determining a field strength region to be optimized in the non-contact antenna layout provided by the present application;

[0066] Figure 7 An embodiment flowchart of a method for whole machine electromagnetic field simulation in the non-contact antenna layout provided by the present application;

[0067] Figure 8 An embodiment structure diagram of a device for non-contact antenna layout provided by the present application;

[0068] Figure 9 Another embodiment structure diagram of a device for non-contact antenna layout provided by the present application. DETAILED DESCRIPTION

[0069] It should be noted that the method, device and storage medium for non-contact antenna layout provided by the present application can be applied to a terminal, a system or a server. For example, the terminal can be a smart phone, a computer, a tablet computer, a portable computer terminal or a desktop computer. For convenience, the terminal is taken as an example in the present application.

[0070] Please refer to Figure 1 ,Figure 1 An embodiment of the method for providing a non-contact antenna layout of the present application includes:

[0071] S101, obtaining field strength distribution information of a non-contact antenna on a mainboard of a terminal, the field strength distribution information being information obtained through simulation;

[0072] Non-contact antennas are classified into near field communication (NFC) antennas, Bluetooth antennas, etc., and are widely applied. For example, an NFC antenna is responsible for realizing wireless communication between terminals and can be used to support mobile payment, access control systems, public transportation cards, etc. of a terminal. In order to ensure that the non-contact antenna of the terminal can work normally and stably, the non-contact antenna must meet certain design requirements.

[0073] The field strength distribution information of the non-contact antenna on the mainboard of the terminal can be obtained through electromagnetic simulation software. By simulating the actual working environment of the non-contact antenna on the mainboard of the terminal through electromagnetic field simulation of the whole terminal, key parameters of the non-contact antenna can be obtained, so as to evaluate the performance of the non-contact antenna and the coupling with other components of the terminal. Electromagnetic simulation software such as Ansoft High Frequency Structure Simulator (HFSS) and CST Studio Suite (CST) is usually used. These electromagnetic simulation software can simulate the non-contact antenna on the mainboard of the terminal based on advanced algorithms such as finite element method (FEM) or finite difference time domain method (FDID). After simulation is completed, the field strength distribution information of the non-contact antenna will be generated, including magnetic field strength, electric field strength, and field distribution, etc.

[0074] S102, determining a field strength region to be optimized in the mainboard according to the field strength distribution information;

[0075] The electromagnetic characteristics of the non-contact antenna are affected by factors such as wiring mode and working environment. If the design is not proper, it may cause uneven field strength and fail to meet the communication requirements. For example, metal objects near the non-contact antenna may absorb or reflect electromagnetic waves, causing the field strength of the non-contact antenna to weaken in some directions, or the wiring mode of the non-contact antenna limits the electromagnetic field distribution, causing the electromagnetic field of the non-contact antenna to fail to cover the working area.

[0076] The field strength distribution information obtained through the whole machine simulation by the electromagnetic simulation software distinguishes the region that cannot meet the communication requirements, and determines it as the field strength region to be optimized in the mainboard, so as to make targeted adjustment to the non-contact antenna.

[0077] S103, performing an adjustment operation on the non-contact antenna in the field strength region to be optimized, the adjustment operation including adjusting the wiring mode of the non-contact antenna from straight-line wiring to spiral wiring and adjusting the physical parameters of the non-contact antenna.

[0078] For the determined to-be-optimized field strength region, the non-contact antenna is adjusted, including changing the wiring mode and adjusting the physical parameters. The straight-line wiring is simple and direct, but is susceptible to interference and cannot provide the best electromagnetic characteristics in the complex internal environment of the terminal. The wiring mode of the non-contact antenna is adjusted from the straight-line wiring to the spiral wiring, which can optimize the electromagnetic characteristics such as the electromagnetic field distribution and the field strength of the to-be-optimized field strength region, and improve the efficiency and performance of the non-contact antenna. In addition, the physical parameters of the non-contact antenna also affect the electromagnetic characteristics, so in addition to changing the wiring mode, the physical parameters of the non-contact antenna also need to be adjusted according to specific needs, so that the non-contact antenna meets the required performance.

[0079] In this embodiment, the field strength distribution information of the non-contact antenna on the mainboard of the terminal is obtained, the to-be-optimized field strength region of the non-contact antenna is determined from the field strength distribution information, and the wiring mode and the physical parameters of the non-contact antenna are adjusted according to the to-be-optimized field strength region. The straight-line wiring mode of the non-contact antenna in the to-be-optimized field strength region is adjusted to the spiral wiring, so that the electromagnetic characteristics such as the electromagnetic field distribution and the field strength of the to-be-optimized field strength region are optimized, and the efficiency and performance of the non-contact antenna are improved. By changing the wiring mode of the non-contact antenna, the field strength of the non-contact antenna at each location is adjusted, so that the non-contact antenna signal can cover the working area, and the payment efficiency and user payment experience are improved.

[0080] In the above step S103, the adjustment operation is performed on the non-contact antenna in the to-be-optimized field strength region. Please refer to Figure 2 , Figure 2 An embodiment of the adjustment operation performed in the non-contact antenna layout method provided in the present application includes the following steps.

[0081] S201, determining an adjustment target of the to-be-optimized field strength region;

[0082] By performing the whole-machine electromagnetic field simulation on the non-contact antenna on the mainboard of the terminal, the to-be-optimized field strength region in the mainboard, i.e., the region where communication instability may occur, can be found. Therefore, the adjustment target of the to-be-optimized field strength region needs to be determined to effectively improve the field strength of the to-be-optimized field strength region, so that the field strength of the region meets the application requirements. For example, the field strength value is obtained from the field strength distribution information obtained from the simulation, and then compared with the designed field strength value. If the field strength value of the to-be-optimized field strength region is low and does not meet the design requirements, the adjustment target is to enhance the field strength, and vice versa. Or the magnetic field distribution center is found to be offset from the field strength distribution information, and the adjustment target is determined as adjusting the magnetic field distribution center.

[0083] S202, calculating the physical parameters of the non-contact antenna according to the adjustment target, the physical parameters including the size, the number of turns, and the spacing of the coil;

[0084] To improve the field strength of the region to be optimized, the physical parameters of the non-contact antenna, including the size, number of turns and spacing of the coil, need to be adjusted. These parameters will directly affect the electromagnetic field distribution and radiation characteristics of the non-contact antenna.

[0085] Increasing the size of the coil may help to enhance the field strength, but it may also increase the volume and cost of the non-contact antenna. Increasing the number of turns of the coil can increase the inductance of the non-contact antenna, thereby changing its electromagnetic field distribution, but it may also result in an increase in the resistance of the non-contact antenna and a decrease in efficiency. In addition, the spacing of the coil also affects the performance of the non-contact antenna. In practical applications, the performance of the non-contact antenna is not only affected by its own physical parameters, but also by factors such as its working environment, so there is a difference between the theoretical calculation and the actual application of the performance of the non-contact antenna. In order to make the performance of the non-contact antenna closer to the ideal state of design, various factors need to be considered, and then the optimal combination of physical parameters is determined through the optimization algorithm in the electromagnetic simulation software. Therefore, after adjusting the physical parameters of the non-contact antenna, the electromagnetic field simulation of the whole machine needs to be performed again to verify whether the adjustment is effective. If the performance of the adjusted non-contact antenna still does not meet the requirements, the adjustment will continue until it approaches or meets the design requirements.

[0086] S203, according to the physical parameters, the wiring mode of the non-contact antenna in the region to be optimized is adjusted from straight-line wiring to spiral wiring.

[0087] Based on the calculated size, number of turns and spacing of the coil, the wiring mode of the non-contact antenna is adjusted from straight-line wiring to spiral wiring. According to the magnetic flux formula Φ = BS, by adjusting the wiring mode to spiral wiring, the magnetic flux Φ in the region to be optimized S can be superimposed or reduced, and the field strength B can be increased or decreased accordingly, thereby optimizing the field strength of the region to be optimized, so that the non-contact antenna can work in a wider frequency range, enhancing the reception and transmission capabilities of the signal, to achieve the adjustment target of optimizing the magnetic field strength, expanding the coverage range or optimizing the electromagnetic field distribution, etc.

[0088] In this embodiment, according to the adjustment target, the physical parameters of the size, number of turns and spacing of the coil are changed, and the wiring mode of the non-contact antenna is adjusted from straight-line wiring to spiral wiring. The spiral wiring mode can effectively optimize the field strength generated by the non-contact antenna. At the same time, through the adjustment of the physical parameters of the non-contact antenna, the spiral wiring of the non-contact antenna can meet different adjustment targets such as optimizing the field strength and adjusting the center of the magnetic field distribution. In addition, the adjusted non-contact antenna is simulated and verified again, and the optimal physical parameters are iterated by using the optimization algorithm of the electromagnetic simulation software, which can ensure that the non-contact antenna meets the performance requirements of the design.

[0089] In some specific embodiments, in addition to adjusting the wiring mode of the non-contact antenna from straight-line wiring to spiral wiring according to the physical parameters, the direction of the spiral wiring also needs to be adjusted. Please refer to Figure 3 ,Figure 3 One embodiment of adjusting the spiral trace direction in the method of non-contact antenna layout provided in the present application comprises:

[0090] S301, when the adjustment target is to enhance the field strength, the spiral trace is a same-direction spiral trace;

[0091] When the simulation result shows that the field strength of the to-be-optimized field strength region of the non-contact antenna should be enhanced, a same-direction spiral trace can be used. When a same-direction spiral trace is used, each turn of the coil is wound in the same direction, so that the magnetic flux is superimposed. According to the magnetic flux formula Φ = BS, the magnetic flux Φ in the to-be-optimized field strength region S is superimposed, and the field strength B is enhanced. By adjusting the physical parameters of the spiral trace, the performance of the antenna can be further optimized to ensure that the to-be-optimized field strength region reaches the required field strength level.

[0092] S302, when the adjustment target is to weaken the field strength, the spiral trace is a reverse spiral trace.

[0093] If the field strength of the to-be-optimized field strength region is too strong, it may interfere with surrounding electronic terminals or cause unstable communication, for example, signal saturation caused by too strong field strength. At this time, the adjustment target is to weaken the field strength of the region, and a reverse spiral trace is needed, that is, each turn of the coil is wound in the opposite direction of the main winding direction. The reverse spiral trace is opposite to the original magnetic field direction, and the magnetic fields cancel each other out, reducing the effective magnetic flux. According to the magnetic flux formula Φ = BS, the magnetic flux Φ in the to-be-optimized field strength region S is reduced, and the field strength B is reduced.

[0094] Please refer to Figure 4 , Figure 4 One embodiment structure diagram of the trace mode after the adjustment operation in the method of non-contact antenna layout provided in the present application. According to the field strength distribution information of the non-contact antenna, multiple to-be-optimized field strength regions can be determined, and the adjustment targets of the multiple to-be-optimized field strength regions are not the same. If the adjustment target of the to-be-optimized field strength region is to enhance the field strength, the straight trace needs to be adjusted to a same-direction spiral trace, and if the adjustment target of the to-be-optimized field strength region is to weaken the field strength, the straight trace needs to be adjusted to a reverse spiral trace. At the same time, the same-direction spiral trace and the reverse spiral trace are adjusted according to the physical parameters of the non-contact antenna to achieve the best field strength optimization effect, and the to-be-optimized field strength region remains the original straight trace mode. The non-contact antenna after the adjustment operation can simultaneously have three trace modes of same-direction spiral trace, straight trace and reverse spiral trace.

[0095] In this embodiment, when the field strength needs to be enhanced, the same direction helical trace is used to enhance the field strength generated by the non-contact antenna. When the field strength is too strong and needs to be weakened, the reverse helical trace is used to reduce the field strength and reduce the interference to the surrounding electronic terminals or cause unstable communication. According to the different adjustment targets, the same direction helical trace or the reverse helical trace can be selected to accurately optimize the performance of the non-contact antenna, so that the field strength of the region to be optimized can reach the required level. The original trace mode is retained for the region not to be optimized, which reduces unnecessary adjustment operations and ensures the effectiveness and necessity of the adjustment operation while ensuring the performance of the non-contact antenna.

[0096] In the above step S102, the region to be optimized in the main plate needs to be determined according to the field strength distribution information. Please refer to Figure 5 , Figure 5 An embodiment of determining the region to be optimized in the method of arranging the non-contact antenna provided in the present application includes:

[0097] S501, determining the field strength threshold of different regions in the main plate based on the EMV authentication requirement;

[0098] EMV authentication is a set of internationally recognized payment card security standards, which ensures the security and compatibility of payment transactions. In applications involving electromagnetic fields, EMV authentication needs to measure the field strength at different positions, such as the center point field strength and the outer circle point field strength. In addition, the field strength at different distances also needs to be measured, and EMV authentication has different field strength requirements for different positions and different distances. According to the EMV authentication requirement, a field strength threshold is set for the field strength at each position and distance in the main plate, which ensures the safety and reliability of EMV authentication.

[0099] S502, determining the region not meeting the field strength threshold as the region to be optimized in the main plate according to the field strength distribution information.

[0100] The field strength distribution information of the non-contact antenna is compared with the field strength threshold of EMV authentication. If the field strength of a certain region exceeds or is lower than the field strength threshold of EMV authentication, this region cannot effectively support EMV authentication. The region not meeting the field strength threshold of EMV authentication is determined as the region to be optimized, which facilitates subsequent optimization and adjustment of the region.

[0101] In this embodiment, by setting the field strength threshold of different regions according to the EMV authentication requirement, the field strength distribution information of the non-contact antenna is compared with the set field strength threshold, so as to distinguish the region to be optimized not meeting the set field strength threshold, which provides a clear direction for subsequent optimization and adjustment, and also ensures that the field strength of the working region of the non-contact antenna meets the requirement of EMV authentication, thereby improving the overall performance of the non-contact antenna.

[0102] In some specific embodiments, in addition to determining the field strength region to be optimized in the mainboard according to the field strength threshold of EMV authentication, the field strength region to be optimized in the mainboard also needs to be determined according to field strength uniformity, please refer to Figure 6 , Figure 6 Another embodiment of the method for providing a non-contact antenna layout provided in the present application determines the field strength region to be optimized, and the embodiment includes:

[0103] S601, performing field strength uniformity checking according to field strength distribution information;

[0104] Field strength uniformity refers to whether the intensity of the electromagnetic field generated by the non-contact antenna at different positions remains consistent or fluctuates within an acceptable range when the terminal is working, which affects the performance of the non-contact antenna.

[0105] The field strength distribution information is obtained using electromagnetic simulation software, and the field strength distribution information obtained after simulation is compared with the evaluation standard or threshold of field strength uniformity to determine whether the field strength is uniform. If the field strength difference in a certain region exceeds or is lower than the evaluation standard or threshold of field strength uniformity, it is considered that the field strength uniformity of this region does not pass.

[0106] S602, determining the region that does not pass the field strength uniformity checking as the field strength region to be optimized in the mainboard.

[0107] After the region that does not pass the field strength uniformity checking is determined, these regions are marked as the field strength region to be optimized, so as to perform targeted adjustment or optimization on these regions to meet the requirements of field strength uniformity.

[0108] In this embodiment, through the field strength uniformity checking of the field strength distribution information of the non-contact antenna on the mainboard of the terminal, the regions with uneven field strength distribution can be identified, which may adversely affect the performance of the non-contact antenna due to the field strength difference exceeding or being lower than the safety threshold. These uneven regions are determined as the field strength region to be optimized, which provides a clear target and direction for subsequent adjustment and optimization work, to ensure that the performance of the non-contact antenna at different positions is consistent, thereby providing users with more reliable and efficient use experience.

[0109] In the above step S101, the field strength distribution information of the non-contact antenna on the mainboard of the terminal is obtained through simulation, please refer to Figure 7 , Figure 7 One embodiment of the method for providing a non-contact antenna layout provided in the present application includes whole machine electromagnetic field simulation, and the embodiment includes:

[0110] S701, defining the component material properties of the non-contact antenna according to the whole machine environment of the terminal, and constructing a non-contact antenna model;

[0111] Objects near the non-contact antenna can affect the field distribution, so the simulation of the non-contact antenna also needs to consider the objects around the non-contact antenna, such as chips, metal elements, shells, ferrite sheets, etc. Before simulation, first determine and set the material properties of the components of the non-contact antenna in the electromagnetic simulation software, such as the conductor material of the non-contact antenna is aluminum or copper, the material of the substrate is a PCB board, etc. These component materials will directly affect the conductivity, durability and signal transmission efficiency of the non-contact antenna.

[0112] Then construct a non-contact antenna geometric model according to the actual non-contact antenna or the designed non-contact antenna, which needs to accurately reflect the size, shape of the non-contact antenna and its relative position with other components. Generally, the geometric model of the non-contact antenna can be directly constructed using electromagnetic simulation software, such as HFSS, CST, etc., or drawn using 3D modeling software, such as SolidWorks, AutoCAD, etc., and then imported into the electromagnetic simulation software.

[0113] S702, set the simulation environment of the non-contact antenna model;

[0114] In the electromagnetic simulation software, a simulation scene simulating the real working environment needs to be configured to predict and optimize the performance of the non-contact antenna, verify the feasibility of the non-contact antenna design, simulate the influence of the real working environment, and improve the test efficiency and accuracy.

[0115] In some specific embodiments, setting the simulation environment of the non-contact antenna model includes setting the simulation excitation, field monitor, mesh, solver, working frequency, boundary condition and convergence parameter of the non-contact antenna model, which will be described in detail as follows:

[0116] Taking the simulation of the NFC antenna as an example, the simulation excitation is a signal source simulating the NFC antenna in actual work, a lumped port is added at the feed point of the NFC antenna, the excitation frequency is defined as 13.56 MHz, and the port impedance is set according to the actual situation. For the NFC antenna, the magnetic field distribution is usually more important, and a field monitor needs to be added at the frequency of 13.56 MHz to analyze the power density or the field in a specific direction. Due to the low-frequency characteristics of the NFC antenna, the wavelength is longer at low frequency, and a fine mesh is needed to capture the near-field characteristics, so the mesh type is set to hexahedral mesh to obtain better accuracy, and the adaptive mesh is adjusted to increase the mesh density in key areas such as the coil and gap. According to the low-frequency characteristics of the NFC antenna, a magnetic quasi-static solver is selected, the NFC antenna model is simulated using the magnetic quasi-static solver, and the convergence criteria of the magnetic quasi-static solver and the simulation working frequency of 13.56 MHz are set according to the characteristics of the NFC antenna. The NFC antenna is concerned about the near-field distribution, the absorbing boundary condition can be set using far-field calculation, and the open region is used to simulate infinite space to more truly reflect the field distribution around the NFC antenna.

[0117] S703, simulate the non-contact antenna model according to the simulation environment to obtain field strength distribution information of the non-contact antenna on the mainboard of the terminal.

[0118] After the simulation environment and the non-contact antenna model are configured, the electromagnetic simulation software is run to calculate the electromagnetic performance of the non-contact antenna. After the simulation is completed, the electromagnetic simulation software generates a series of data of the non-contact antenna, for example, the CST software can quickly and accurately calculate the magnetic field, electric field and other related parameters of the non-contact antenna when simulating the non-contact antenna. At the same time, the simulation data can be analyzed by using the visualization tools of the CST, for example, the three-dimensional field distribution of the electric field and the magnetic field of the non-contact antenna can be viewed under the three-dimensional view in the CST; the field distribution on a specific plane can be viewed by using the slice view, so that the strength and direction of the field can be more intuitively observed; the numerical value of the field strength at a specified position can be obtained by using the probe function of the CST. If it is necessary to further analyze the field strength distribution information, the data in the electromagnetic simulation software can be exported to evaluate the performance of the non-contact antenna.

[0119] In this embodiment, the real working environment of the non-contact antenna is simulated by the electromagnetic simulation software, the non-contact antenna model is simulated, and therefore more actual field strength distribution information of the non-contact antenna is obtained, which is beneficial to subsequent effective and targeted optimization and adjustment of the non-contact antenna, ensures the accuracy and reliability of the design of the non-contact antenna, and improves the performance of the non-contact antenna in actual application.

[0120] Please refer to Figure 8 The application also provides a non-contact antenna layout device, which comprises:

[0121] The acquisition unit 801 is configured to acquire field strength distribution information of a non-contact antenna on a mainboard of a terminal, the field strength distribution information being information obtained through simulation;

[0122] The determination unit 802 is configured to determine a to-be-optimized field strength area on the mainboard according to the field strength distribution information.

[0123] The adjustment unit 803 is configured to perform an adjustment operation on the non-contact antenna in the to-be-optimized field strength area, the adjustment operation comprising adjusting a wiring mode of the non-contact antenna from a straight-line wiring to a spiral wiring and adjusting a physical parameter of the non-contact antenna.

[0124] Optionally, the adjustment unit 803 is further configured to:

[0125] determine an adjustment target of the to-be-optimized field strength area;

[0126] calculate the physical parameter of the non-contact antenna according to the adjustment target, the physical parameter comprising a size, a number of turns and a spacing of a coil;

[0127] According to the physical parameter, the wire mode of the non-contact antenna in the field strength region to be optimized is adjusted from a straight line to a spiral line.

[0128] Optionally, the adjustment unit 803 is further configured to:

[0129] When the adjustment target is to enhance the field strength, the spiral line is a same-direction spiral line;

[0130] When the adjustment target is to weaken the field strength, the spiral line is a reverse spiral line.

[0131] Optionally, the determination unit 802 is further configured to:

[0132] Determine, based on the EMV authentication requirement, a field strength threshold of different regions in the mainboard;

[0133] According to the field strength distribution information, determine a region that does not meet the field strength threshold as a field strength region to be optimized in the mainboard.

[0134] Optionally, the determination unit 802 is further configured to:

[0135] According to the field strength distribution information, perform a field strength uniformity check;

[0136] Determine a region that fails the field strength uniformity check as a field strength region to be optimized in the mainboard.

[0137] Optionally, the acquisition unit 801 is further configured to:

[0138] Define a component material attribute of the non-contact antenna according to the whole machine environment of the terminal, and construct a non-contact antenna model;

[0139] Set a simulation environment of the non-contact antenna model;

[0140] According to the simulation environment, simulate the non-contact antenna model to obtain field strength distribution information of the non-contact antenna on the mainboard of the terminal.

[0141] Optionally, the acquisition unit 801 is further configured to:

[0142] Set a simulation excitation, a field monitor, a grid, a solver, a working frequency, a boundary condition, and a convergence parameter of the non-contact antenna model.

[0143] Please refer to Figure 9 The application also provides a non-contact antenna layout device, comprising:

[0144] A processor 901, a memory 902, an input / output unit 903, and a bus 904;

[0145] The processor 901 is connected with the memory 902, the input / output unit 903, and the bus 904;

[0146] The memory 902 stores a program, and the processor 901 invokes the program to perform any of the above methods.

[0147] The application also relates to a computer readable storage medium, which stores a program, and when the program runs on a computer, the computer performs any of the above methods.

[0148] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0149] In several embodiments provided in the application, it should be understood that the disclosed system, device and method can be implemented in other manners. For example, the described device embodiments are merely schematic, and the division of units is merely a logical function division, and there can be another division manner in actual implementation, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0150] The units described as separated components can or can not be physically separated, and the components displayed as units can or can not be physical units, that is, can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purposes of the embodiments.

[0151] In addition, each functional unit in the embodiments of the application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be implemented in the form of hardware, or in the form of software functional units.

[0152] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a computer-readable storage medium. Based on such understanding, the technical solutions of the present application, essentially or in other words, the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a number of instructions to make a computer terminal (which can be a personal computer, a server, or a network terminal, etc.) execute all or part of the steps of the various embodiments of the method of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, read-only memory), a random access memory (RAM, random access memory), a magnetic disk or an optical disk, and various media that can store program codes.

Claims

1. A method for non-contact antenna layout, characterized in that, The method includes: Obtain the field strength distribution information of the non-contact antenna on the motherboard of the terminal, wherein the field strength distribution information is obtained through simulation; The field strength region to be optimized in the motherboard is determined based on the field strength distribution information. Determine the adjustment target for the field strength region to be optimized; The physical parameters of the contactless antenna are calculated based on the adjustment target, and the physical parameters include the coil size, number of turns, and spacing. Based on the physical parameters, the routing of the non-contact antenna in the field strength region to be optimized is adjusted from a straight line to a spiral routing; when the adjustment target is to enhance the field strength, the spiral routing is a spiral routing in the same direction; when the adjustment target is to weaken the field strength, the spiral routing is a spiral routing in the opposite direction.

2. The method according to claim 1, characterized in that, The step of determining the region of field strength to be optimized in the motherboard based on the field strength distribution information includes: The field strength threshold for different areas in the motherboard is determined based on EMV certification requirements; Based on the field strength distribution information, the regions that do not meet the field strength threshold are identified as the field strength regions to be optimized in the motherboard.

3. The method according to claim 1, characterized in that, The step of determining the region of field strength to be optimized in the motherboard based on the field strength distribution information includes: Perform a field strength uniformity check based on the field strength distribution information; The areas that fail the field strength uniformity check are identified as the field strength areas to be optimized in the motherboard.

4. The method according to any one of claims 1 to 3, characterized in that, The acquisition of the field strength distribution information of the non-contact antenna on the motherboard of the terminal includes: Define the component material properties of the non-contact antenna based on the overall environment of the terminal, and construct a non-contact antenna model; Set up the simulation environment for the non-contact antenna model; The contactless antenna model is simulated using the simulation environment to obtain the field strength distribution information of the contactless antenna on the motherboard of the terminal.

5. The method according to claim 4, characterized in that, The simulation environment for setting up the contactless antenna model includes: Configure the simulation excitation, field monitor, mesh, solver, operating frequency, boundary conditions, and convergence parameters for the non-contact antenna model.

6. A device with a non-contact antenna layout, characterized in that, The device includes: The acquisition unit is used to acquire the field strength distribution information of the non-contact antenna on the motherboard of the terminal, wherein the field strength distribution information is obtained through simulation. A determining unit is used to determine the field strength region to be optimized on the motherboard based on the field strength distribution information; An adjustment unit is used to determine the adjustment target of the field strength region to be optimized; calculate the physical parameters of the unconnected antenna according to the adjustment target, the physical parameters including the coil size, number of turns and spacing; adjust the routing of the unconnected antenna in the field strength region to be optimized from a straight line to a spiral routing according to the physical parameters; when the adjustment target is to enhance the field strength, the spiral routing is a unidirectional spiral routing; when the adjustment target is to weaken the field strength, the spiral routing is a reverse spiral routing.

7. A device with a non-contact antenna layout, characterized in that, The device includes: Processor, memory, input / output units, and bus; The processor is connected to the memory, the input / output unit, and the bus; The memory stores a program, which the processor invokes to perform the method as described in any one of claims 1 to 5.

8. A computer-readable storage medium having a program stored thereon, the program performing the method as described in any one of claims 1 to 5 when executed on a computer.

Images